CN214715463U

CN214715463U - Tail gas treatment system for artificial board glue making

Info

Publication number: CN214715463U
Application number: CN202120701948.5U
Authority: CN
Inventors: 毛恒
Original assignee: Guangxi Zhengdong Chemical Equipment Co ltd
Current assignee: Guangxi Zhengdong Chemical Equipment Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-11-16
Anticipated expiration: 2031-04-07

Abstract

The utility model relates to the technical field of tail gas treatment, in particular to a tail gas treatment system during glue making of artificial boards, which comprises a condenser, a spray tower, an active carbon container and a purification tank; the purification tank comprises a purification cavity, a stirring device, a heating device, a feeding pipe, a discharging pipe, a controller and an air pressure control device; in practical application, a tail gas outlet of the glue making reaction kettle enters a condenser through a condensing pipe for condensation, then enters a spray tower through a spray pipe for washing, enters an activated carbon container through an adsorption pipe for adsorption and filtration, and then enters a purification tank through a purification pipe; the controller controls the air pressure in the purification cavity by controlling the air pressure control device, the heating device controls the temperature inside the purification cavity, the stirring device stirs and uniformly mixes the formaldehyde wastewater and the catalyst in the purification cavity after the catalyst is put into the feeding pipe, and organic and inorganic carbon in the formaldehyde wastewater can be selectively decomposed into CO2 and H2O; the utility model discloses can effectively prevent formaldehyde waste water direct discharge, it is better to the protection effect of environment.

Description

Tail gas treatment system for artificial board glue making

Technical Field

The utility model relates to a tail gas treatment technical field specifically is tail gas treatment system when artificial board system is glued.

Background

The production line of the artificial board mostly adopts urea-formaldehyde resin glue as a binder, and the urea-formaldehyde resin is generated by the reaction of urea and formaldehyde under the action of a catalyst. In the process of producing the urea-formaldehyde resin adhesive by the adhesive-making reaction kettle, adhesive-making tail gas containing formaldehyde can be discharged, and if formaldehyde is not removed, the environment can be polluted. The existing glue-making tail gas treatment process comprises condenser condensation, spray tower water washing and activated carbon adsorption. Although the process can meet the standard emission requirement of the tail gas of rubber making, the process can also generate wastewater containing a large amount of formaldehyde, and secondary pollution can be caused if the treatment is not good.

The catalytic wet oxidation is a treatment technology for treating high-concentration organic wastewater. The method is characterized in that organic pollutants in the organic wastewater are oxidized into inorganic substances or micromolecular organic substances such as CO2, H2O and the like in a liquid phase under the conditions of high temperature (125-320 ℃) and high pressure (0.5-20 MPa) by taking air or pure oxygen as an oxidant under the action of a catalyst. The process is a green, energy-saving and environment-friendly organic wastewater treatment method, and is very suitable for treating high-concentration organic wastewater, so that a tail gas treatment system in glue making of artificial boards is reformed and innovated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to foretell not enough, provide a tail gas treatment system when can effectively prevent formaldehyde waste water direct emission, glue to the better wood-based plate system of protection effect of environment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the tail gas treatment system comprises a condenser, a spray tower, an active carbon container and a purification tank, a tail gas outlet for connecting the glue making reaction kettle and a condensation pipe adopted by the condenser, a spray pipe for connecting the condenser and the spray tower, an adsorption pipe for connecting the spray tower and the active carbon container and a purification pipe for connecting the active carbon container and the purification tank; be provided with in the purifying tank and purify the chamber, be provided with agitating unit and heating device in the purification chamber, the top and the bottom of purifying tank are provided with the pan feeding pipe respectively and arrange the material pipe, one side of purifying tank is provided with the controller, the opposite side of purifying tank is provided with air pressure control device, air pressure control device is used for control purify the atmospheric pressure in the intracavity, agitating unit, heating device and the equal electric connection of air pressure control device the controller.

Further, a first electromagnetic valve and a second electromagnetic valve are respectively arranged in the feeding pipe and the discharging pipe, and a third electromagnetic valve is arranged in the purifying pipe.

Further, agitating unit including vertical set up in purify the (mixing) shaft in chamber middle part, be provided with the multi-disc stirring vane on the (mixing) shaft, the top of (mixing) shaft is worn out purify the chamber and be connected with agitator motor's output shaft.

Further, heating device is including inlaying locate many heating pipes and temperature sensitive switch on the purification intracavity lateral wall, heating pipe electric connection the temperature sensitive switch.

Further, the air pressure control device comprises an air pump arranged on one side of the purification tank, an air pipe connected with the air pump and the purification cavity, and a pressure sensor embedded on the inner side wall of the purification cavity.

The utility model has the advantages that:

in practical application, a tail gas outlet of the glue making reaction kettle enters a condenser through a condensing pipe for condensation, then enters a spray tower through a spray pipe for washing, enters an activated carbon container through an adsorption pipe for adsorption and filtration, and then enters a purification tank through a purification pipe; the controller controls the air pressure in the purification cavity to be 2-15 MPa all the time by controlling the air pressure control device, controls the temperature inside the purification cavity to be 180-315 ℃ all the time by controlling the heating device, and after the catalyst is put into the purification cavity through the feeding pipe, the stirring device uniformly stirs and mixes the formaldehyde wastewater and the catalyst in the purification cavity, organic and inorganic carbon in the formaldehyde wastewater can be selectively decomposed into CO2 and H2O, and the decomposed water is safer to discharge from the discharging pipe because nitrogen oxide, sulfur oxide, hydrogen chloride, fly ash and the like cannot be generated, and the environment protection effect is better because the removal rate of formaldehyde and CODCr can reach more than 90%; the utility model discloses can effectively prevent formaldehyde waste water direct discharge, it is better to the protection effect of environment.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the purification tank of the present invention;

reference numerals: a condenser 1; a spray tower 2; an activated carbon container 3; a purification tank 4; a purge chamber 41; a feed tube 42; a discharge pipe 43; a controller 5; a first electromagnetic valve 61; a second solenoid valve 62; a third electromagnetic valve 63; a stirring shaft 71; the stirring vanes 72; a stirring motor 73; a heating pipe 81; a temperature-sensitive switch 82; an air pressure control device 9; an air pump 91; an air tube 92; a pressure sensor 93.

Detailed Description

As shown in fig. 1 and 2, the tail gas treatment system for artificial board glue making comprises a condenser 1, a spray tower 2, an activated carbon container 3 and a purification tank 4, a tail gas outlet for connecting a glue making reaction kettle and a condenser pipe adopted by the condenser 1, a spray pipe for connecting the condenser 1 and the spray tower 2, an adsorption pipe for connecting the spray tower 2 and the activated carbon container 3, and a purification pipe for connecting the activated carbon container 3 and the purification tank 4; be provided with in the purifying tank 4 and purify chamber 41, be provided with agitating unit and heating device in purifying chamber 41, the top and the bottom of purifying tank 4 are provided with pan feeding pipe 42 respectively and arrange material pipe 43, one side of purifying tank 4 is provided with controller 5, the opposite side of purifying tank 4 is provided with air pressure control device 9, air pressure control device 9 is used for control purify atmospheric pressure in the chamber 41, agitating unit, heating device and the equal electric connection of air pressure control device 9 controller 5.

When in use, the tail gas outlet of the glue-making reaction kettle enters the condenser 1 through the condensing pipe for condensation, then enters the spray tower 2 through the spray pipe for washing, then enters the activated carbon container 3 through the adsorption pipe for adsorption and filtration, and then enters the purification tank 4 through the purification pipe; the controller 5 controls the air pressure in the purification cavity 41 to be 2-15 MPa all the time by controlling the air pressure control device 9, controls the temperature inside the purification cavity 41 to be 180-315 ℃ all the time by controlling the heating device, and uniformly mixes the formaldehyde wastewater and the catalyst in the purification cavity 41 after the catalyst is put in through the feeding pipe 42, so that organic and inorganic carbon in the formaldehyde wastewater can be selectively decomposed into CO2 and H2O, the decomposed water is safer to discharge from the discharging pipe 43 because nitrogen oxides, sulfur oxides, hydrogen chloride, fly ash and the like cannot be generated, and the environment protection effect is better because the removal rate of formaldehyde and CODCr can reach more than 90%; the utility model discloses can effectively prevent formaldehyde waste water direct discharge, it is better to the protection effect of environment.

As shown in fig. 1 and fig. 2, a first electromagnetic valve 61 and a second electromagnetic valve 62 are respectively arranged in the feeding pipe 42 and the discharging pipe 43, and a third electromagnetic valve 63 is arranged in the purge pipe; in this embodiment, the first solenoid valve 61 controls the opening or closing of the feeding pipe 42, the second solenoid valve 62 controls the opening or closing of the discharging pipe 43, and the third solenoid valve 63 controls the opening or closing of the purge pipe.

As shown in fig. 1 and fig. 2, the stirring device includes a stirring shaft 71 vertically disposed in the middle of the purification chamber 41, the stirring shaft 71 is provided with a plurality of stirring blades 72, and the top end of the stirring shaft 71 penetrates through the purification chamber 41 and is connected to an output shaft of a stirring motor 73; in this embodiment, the catalyst is CuO-ZnO or Al2O3, and after the catalyst is put into the feeding pipe 42, the stirring motor 73 drives the stirring shaft 71 to rotate, and the stirring shaft 71 drives the stirring blades 72 to stir, so that the catalyst is quickly and fully contacted with the formaldehyde wastewater.

As shown in fig. 1 and fig. 2, the heating device includes a plurality of heating pipes 81 embedded on the inner side wall of the purification chamber 41 and a temperature-sensitive switch 82, and the heating pipes 81 are electrically connected to the temperature-sensitive switch 82; in the embodiment, the interior of the purification cavity 41 is simultaneously heated by the heating pipes 81, and when the temperature in the purification cavity 41 is too high, the temperature-sensitive switch 82 automatically cuts off the power of the heating pipes 81, so that the temperature in the purification cavity 41 is constant at 180-315 ℃, and the formaldehyde wastewater is more suitable for selectively decomposing organic and inorganic carbon in the formaldehyde wastewater into CO2 and H2O, and does not generate nitrogen oxides, sulfur oxides, hydrogen chloride, fly ash and the like.

As shown in fig. 1 and 2, the air pressure control device 9 includes an air pump 91 installed at one side of the purification tank 4, an air pipe 92 connecting the air pump 91 and the purification chamber 41, and a pressure sensor 93 embedded on the inner side wall of the purification chamber 41; in this embodiment, the controller 5 controls the air pressure in the purification chamber 41 by controlling the air pump 91, the air pipe 92 and the pressure sensor 93 to be always maintained at 2 to 15MPa, and is more suitable for selectively decomposing organic and inorganic carbon in the formaldehyde wastewater into CO2 and H2O without generating nitrogen oxides, sulfur oxides, hydrogen chloride, fly ash, and the like.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein will be apparent to those skilled in the art without departing from the scope and spirit of the invention as defined in the accompanying claims.

Claims

1. Tail gas processing system when wood-based plate system is glued, its characterized in that: the device comprises a condenser (1), a spray tower (2), an active carbon container (3) and a purification tank (4), a tail gas outlet for connecting a glue making reaction kettle, a condensation pipe adopted by the condenser (1), a spray pipe for connecting the condenser (1) and the spray tower (2), an adsorption pipe for connecting the spray tower (2) and the active carbon container (3), and a purification pipe for connecting the active carbon container (3) and the purification tank (4);

be provided with in purification tank (4) and purify chamber (41), be provided with agitating unit and heating device in purification chamber (41), the top and the bottom of purification tank (4) are provided with pan feeding pipe (42) respectively and arrange material pipe (43), one side of purification tank (4) is provided with controller (5), the opposite side of purification tank (4) is provided with air pressure control device (9), air pressure control device (9) are used for control purify atmospheric pressure in chamber (41), agitating unit, heating device and the equal electric connection of air pressure control device (9) controller (5).

2. The tail gas treatment system for artificial board glue making according to claim 1, characterized in that: a first electromagnetic valve (61) and a second electromagnetic valve (62) are respectively arranged in the feeding pipe (42) and the discharging pipe (43), and a third electromagnetic valve (63) is arranged in the purifying pipe.

3. The tail gas treatment system for artificial board glue making according to claim 1, characterized in that: the stirring device comprises a stirring shaft (71) vertically arranged in the middle of the purification cavity (41), a plurality of stirring blades (72) are arranged on the stirring shaft (71), and the top end of the stirring shaft (71) penetrates out of the purification cavity (41) and is connected with an output shaft of a stirring motor (73).

4. The tail gas treatment system for artificial board glue making according to claim 1, characterized in that: heating device is including inlaying locate many heating pipes (81) and temperature sensitive switch (82) on purifying chamber (41) inside wall, heating pipe (81) electric connection temperature sensitive switch (82).

5. The tail gas treatment system for artificial board glue making according to claim 1, characterized in that: the air pressure control device (9) comprises an air pump (91) arranged on one side of the purification tank (4), an air pipe (92) used for connecting the air pump (91) and the purification cavity (41), and a pressure sensor (93) embedded on the inner side wall of the purification cavity (41).